CVE-2022-50266None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: kprobes: Fix check for probe enabled in kill_kprobe() In kill_kprobe(), the check whether disarm_kprobe_ftrace() needs to be called always fails. This is because befor…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
kprobes: Fix check for probe enabled in kill_kprobe()
In kill_kprobe(), the check whether disarm_kprobe_ftrace() needs to be called always fails. This is because before that we set the KPROBE_FLAG_GONE flag for kprobe so that "!kprobe_disabled(p)" is always false.
The disarm_kprobe_ftrace() call introduced by commit:
0cb2f1372baa ("kprobes: Fix NULL pointer dereference at kprobe_ftrace_handler")
to fix the NULL pointer reference problem. When the probe is enabled, if we do not disarm it, this problem still exists.
Fix it by putting the probe enabled check before setting the KPROBE_FLAG_GONE flag.
Linux >= 3031313eb3d549b7ad6f9fbcc52ba04412e3eb9e < f20a067f13106565816b4b6a6b665b2088a63824Linux >= 3031313eb3d549b7ad6f9fbcc52ba04412e3eb9e < c909985dd0c0f74b61e3f8f0e04bf8aa9c8b97c7Linux >= 3031313eb3d549b7ad6f9fbcc52ba04412e3eb9e < 0c76ef3f26d5ef2ac2c21b47e7620cff35809fbbLinux 3c5f8d371b7fef3e3714c4a062c7f3b4aa41d122Linux 9b55d84deec88c02b053a819acf08a6d471dda02Linux 2295608b44c91df767a5c68027f9c9e52ecb28e7Linux ce7ff920092130f249b75f9fe177edb3362fefe8Linux 3995f7a60feceba6c8f762f4aff3184f90a1291dLinux 247c62ebdfae450bb76dd89cd4724df6be07df75Linux >= 4.4.238 < 4.5Linux >= 4.9.238 < 4.10Linux >= 4.14.200 < 4.15Linux >= 4.19.149 < 4.20Linux >= 5.4.69 < 5.5Linux >= 5.8.13 < 5.9Linux 5.9Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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